It may also be possible to upgrade higher according to this post: http://blog.lucascaton.com.br/index.php/2014/02/28/have-a-rails-2-app-you-can-run-it-on-the-newest-ruby/
While trying to upgrade an app from Rails 3.2 to 4.0, when trying to run the app I got the...
While trying to upgrade from Rails 3.2 to 4.0 I had this problem when starting the app: NoMethodError: undefined method...
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